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Apparatus for synchronization control of a plurality of inverters

US 4,329,652 A · Assignee: Tokyo Shibaura Electric Company, Limited · Inventors: Higa; Osamu et al.

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Why it's free to use

  • Filed February 27, 1979 and granted May 11, 1982. A patent filed before June 8, 1995 lasts 17 years from grant or 20 from filing, whichever is longer, so its term ended May 11, 1999.
  • Any extension is capped at five years, so it can't still be in force.
  • We haven't checked its US family, and a later related patent could still be in force. We check US rights only.
FiledFebruary 27, 1979
GrantedMay 11, 1982
Term endedMay 11, 1999
Application number06/015638
Classification (CPC)H03K17/00 +2 more
Length6 pages

Timeline

Timeline From USPTO dates

1980198219841986198819901992199419961998Application filedFeb 27, 1979Patent grantedMay 11, 1982Term endedMay 11, 1999

Sources & verification

Official USPTO records

Full published documentText and every drawing sheet as a PDF.USPTOFile historyStatus, office actions, notices, fee records and petitions.USPTO Patent CenterPatent Public Search recordSearchable full text and bibliographic data.USPTO

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